Details of the Implicit Exchange Objects of the T_COM_CHAR Type IODDT for PCMCIA Cards
(Original Document)
About us
At a Glance
The tables below present the implicit exchange objects of the IODDT of the T_COM_CHAR type which apply to Character Mode communication with PCMCIA cards.
Error Bit
The following table presents the meaning of the error bit CH_ERROR (%Ir.m.c.ERR).
Standard Symbol
Type
Access
Meaning
Address
CH_ERROR
EBOOL
R
Communication channel error bit
%Ir.m.c.ERR
Signal Objects on Input
The table below shows the meaning of the bits of the INPUT_SIGNALS word (%IWr.m.c.0).
Standard Symbol
Type
Access
Meaning
Address
DCD
BOOL
R
Data Carrier Detection signal
%IWr.m.c.0.0
RI
BOOL
R
Ring indicator signal
%IWr.m.c.0.1
CTS
BOOL
R
Ready to send signal
%IWr.m.c.0.2
DSR
BOOL
R
Data ready signal
%IWr.m.c.0.3
Signal Objects on Output
The following table presents the meaning of the bit of the STOP_EXCH word (%QWr.m.c.0.0).
Standard Symbol
Type
Access
Meaning
Address
STOP_EXCH
BOOL
R
Rising edge at 1: All exchanges in progress are stopped.
%QWr.m.c.0.0